CN214189584U

CN214189584U - Roof airbag device

Info

Publication number: CN214189584U
Application number: CN202023183494.1U
Authority: CN
Inventors: 闵丙晧; 李湀祥; 李忠宁; 朴海权; 李东吾
Original assignee: Hyundai Mobis Co Ltd
Current assignee: Hyundai Mobis Co Ltd
Priority date: 2020-01-31
Filing date: 2020-12-25
Publication date: 2021-09-14
Anticipated expiration: 2030-12-25
Also published as: DE202020107503U1; US11358556B2; US11554743B2; US20210237675A1; KR20210097918A; US20220266785A1; KR102651824B1

Abstract

A roof airbag apparatus may include: a pad configured to cover the roof in a deployed state; a pair of guides having a length in a deployment direction of the pad and configured to guide both sides of the pad in the deployment direction; and a deployment resistance reducer having a connector connected to one end of each of the guides so as to apply an elastic force from a first position toward a rear direction, wherein the connector is moved to a second position forward of the first position by a frictional resistance applied to the guides in a state where the mat is deployed. According to the present disclosure, the roof airbag device may reduce frictional resistance between the guide and the guide ring when the cushion is deployed, thereby preventing the guide from being damaged due to contraction of the cushion.

Description

Roof airbag device

Technical Field

Exemplary embodiments of the present disclosure relate to a roof airbag apparatus, and more particularly, to a roof airbag apparatus capable of preventing a guide from being damaged when a cushion is deployed.

Background

Generally, a vehicle includes an airbag device installed for passenger safety. In addition, the roof airbag device is installed at a panoramic roof, which is located on a roof of the vehicle.

Such a roof airbag apparatus includes a cushion that is inflated and deployed to prevent an occupant from being injured or thrown out of a vehicle to the outside in the event of a rollover accident of the vehicle. At this time, the cushion is expanded by the gas introduced from the gas supply unit (inflator) and blocks the roof space.

Further, the roof airbag device includes a guide for guiding the cushion in the deployment direction, and the guide ring is coupled to the cushion to slide the cushion along the guide.

However, in the conventional roof airbag device, frictional resistance between the guide ring and the guide is increased by the cushion that contracts when the airbag is deployed, and the guide may be deformed and damaged by the deployment force of the cushion.

SUMMERY OF THE UTILITY MODEL

Various embodiments relate to a roof airbag device capable of preventing damage to a guide when a cushion is deployed.

In one embodiment, a roof airbag device may include: a pad configured to cover the roof in a deployed state; a pair of guides having a length in a deployment direction of the pad and configured to guide both sides of the pad in the deployment direction; and a deployment resistance reducer having a connector connected to one end of each of the guides so as to apply an elastic force from a first position toward a rear direction, wherein the connector is moved to a second position forward of the first position by a frictional resistance applied to the guides in a state where the mat is deployed.

The deployment resistance reducer may exert a restoring elastic force toward the rear so that the connector is restored from the second position to the first position.

The deployment resistance reducer may have a fixed rear end and a front end connected to one end of the guide, and the deployment resistance reducer may apply a tensile elastic force toward the rear.

The length of the deployment resistance reducer may increase toward the front in a state where the cushion is deployed, and the length of the deployment resistance reducer may be restored to an original length by the stretching elastic force in a state where the cushion is fully deployed.

The deployment resistance reducer may be provided in a guide housing that is open at the front.

The guide housing may further include an impact absorbing layer formed in the guide housing, the impact absorbing layer being made of an elastic material.

The deployment resistance reducer may have a fixed front end and a rear end connected to one end of the guide, and the deployment resistance reducer may apply a compressive elastic force toward the rear.

The length of the deployment resistance reducer may be reduced toward the front in a state where the cushion is deployed, and the length of the deployment resistance reducer may be restored to an original length by the compressive elastic force in a state where the cushion is fully deployed.

The deployment resistance reducer may be provided in the guide housing with a front end of the deployment resistance reducer being supported.

A locking member may be locked to a rear end of the deployment resistance reducer so as to move in the front-rear direction, and one end of the guide may be connected to the locking member through the deployment resistance reducer.

The gasket may further include guide rings disposed on either side of the gasket so as to be slidable along the guide.

According to the disclosed embodiments, the roof airbag device may reduce frictional resistance between the guide and the guide ring when the pad is deployed, thereby preventing damage to the guide due to contraction of the pad. Further, a guide housing and an impact absorbing layer may be formed outside the deployment resistance reducer, thereby not only preventing movement of the deployment resistance reducer but also reducing noise and impact due to the movement.

Drawings

Fig. 1 is a perspective view illustrating a roof airbag device according to an embodiment of the present disclosure installed at a roof of a vehicle.

Fig. 2 is a perspective view illustrating a roof airbag device according to an embodiment of the present disclosure.

Fig. 3 is a perspective view illustrating the deployment of a pad of a roof airbag device according to an embodiment of the present disclosure.

Fig. 4 is a side view showing a reduction in length of the deployment resistance reducer when the cushion of the roof airbag apparatus according to the embodiment of the present disclosure is not deployed.

Fig. 5 is a side view showing an increase in length of the deployment resistance reducer upon deployment of a cushion of a roof airbag apparatus according to an embodiment of the present disclosure.

Fig. 6 is a side view showing a reduction in length of the deployment resistance reducer after the pad of the roof airbag apparatus according to the embodiment of the present disclosure has been fully deployed.

Fig. 7 is a side sectional view illustrating formation of an impact absorber in a guide housing of a roof airbag device according to an embodiment of the present disclosure.

Fig. 8 is a side view illustrating a reduction in length of a deployment resistance reducer when a cushion of a roof airbag apparatus according to another embodiment of the present disclosure is not deployed.

Fig. 9 is a side view illustrating an increase in length of a deployment resistance reducer upon deployment of a cushion of a roof airbag apparatus according to another embodiment of the present disclosure.

Fig. 10 is a side view illustrating a reduction in length of a deployment resistance reducer after a pad of a roof airbag apparatus according to another embodiment of the present disclosure has been fully deployed.

Fig. 11 is a side sectional view illustrating a shock absorber formed in a guide housing of a roof airbag device according to another embodiment of the present disclosure.

Detailed Description

Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Advantages and features of the present invention and methods for achieving the same are explained by the following embodiments, which will be described in detail with reference to the accompanying drawings.

However, the present disclosure is not limited to the embodiments disclosed below, but may be implemented in various forms. The embodiments of the present invention are provided to improve the disclosure of the present invention and help those skilled in the art to which the present disclosure pertains fully understand the scope of the present disclosure, and the present disclosure is limited only by the scope of the technical solution.

Further, in describing the present disclosure, when it is determined that the related well-known technology may obscure the subject matter of the present disclosure, a detailed description of the related well-known technology will be omitted.

Fig. 1 is a perspective view illustrating a roof airbag device according to an embodiment of the present disclosure installed at a roof of a vehicle. Fig. 2 is a perspective view illustrating a roof airbag device according to an embodiment of the present disclosure.

Fig. 4 is a side view showing a reduction in length of the deployment resistance reducer when the cushion of the roof airbag apparatus according to the embodiment of the present disclosure is not deployed. Fig. 5 is a side view showing an increase in length of the deployment resistance reducer upon deployment of a cushion of a roof airbag apparatus according to an embodiment of the present disclosure.

Fig. 6 is a side view showing a reduction in length of the deployment resistance reducer after the pad of the roof airbag apparatus according to the embodiment of the present disclosure has been fully deployed. Fig. 7 is a side sectional view illustrating formation of an impact absorber in a guide housing of a roof airbag device according to an embodiment of the present disclosure.

Fig. 8 is a side view illustrating a reduction in length of a deployment resistance reducer when a cushion of a roof airbag apparatus according to another embodiment of the present disclosure is not deployed. Fig. 9 is a side view illustrating an increase in length of a deployment resistance reducer upon deployment of a cushion of a roof airbag apparatus according to another embodiment of the present disclosure.

Fig. 10 is a side view illustrating a reduction in length of a deployment resistance reducer after a pad of a roof airbag apparatus according to another embodiment of the present disclosure has been fully deployed. Fig. 11 is a side sectional view illustrating a shock absorber formed in a guide housing of a roof airbag device according to another embodiment of the present disclosure.

As shown in fig. 1 to 11, a roof airbag device 100 according to an embodiment of the present disclosure includes a pad 110, a pair of guides 120, and a deployment resistance reducer 130.

When gas is supplied from the outside, the cushion 110 may be unfolded forward to cover the open space of the roof 11, and a discharge portion of the inflator 20 for supplying the inflation gas G may be coupled to the rear of the cushion 110.

Such a cushion 110 deploys from the rear toward the front of the vehicle 10 and covers the open space of the roof 11 when gas is supplied into the cushion 110. The cushion 110 may be deployed from the front toward the rear of the vehicle 10.

The cushion 110 may have a filling space 112, the filling space 112 is to be filled with the gas G supplied from the inflator 20, and the filling space 112 may be divided into one or more spaces to communicate with each other.

The cushion 110 may have an inlet 111 formed at a rear end thereof so as to communicate with the filling space 112, the inlet 111 being connected to a discharge portion of the inflator 20. The filling space 112 forms a moving path of the gas G, which is injected from the inflator 20 through an inlet at the rear of the cushion 110.

In addition, the pad 110 may further include a plurality of guide rings 113 formed on either side thereof so as to slide along the guide 120, which will be described below, and each of the guide rings 113 may have a fastening hole formed therethrough in the front-rear direction, so that the guide 120 may be coupled to the fastening hole.

As shown in fig. 1 and 2, the volume of the pad 110 may be reduced such that the pad 110 is accommodated in the case 101 installed adjacent to the space of the vehicle roof 11, and the case 101 may be installed at various positions if necessary.

The inflator 20 may be ignited by spraying a powder by igniting an igniter (not shown) according to a sensing signal of the vibration sensor, and then generate gas.

The pad 110 is unfolded to block the space of the roof 11, thereby preventing passengers located in the passenger space a under the roof 11 from being thrown out of the vehicle through the space of the roof 11 to the outside in the event of a rollover accident.

The pair of guides 120 serves to guide the mat 110 in the unfolding direction, and each guide has a length in the unfolding direction of the mat 110.

The guides 120 may be disposed on the left and right sides of the space of the roof 11, respectively, and may be made of fabric or metal wire to be deformed.

As shown in fig. 2 to 9, the guide 120 has a front end fixedly coupled to a structure of the vehicle and a rear end coupled to a deployment resistance reducer 130, which will be described below.

The front end of the guide 120 may be fixed by a separate fixing member 121, the guide 120 may be coupled through a fastening hole of the guide ring 113, wherein the guide ring 113 is coupled to either side of the pad 110, and the guide ring 113 may slide in the longitudinal direction of the guide 120.

The deployment resistance reducer 130 serves to prevent the guide 120 from being damaged by frictional resistance when the pad 110 is deployed, and the deployment resistance reducer 130 is connected to one end of the guide 120 so as to apply a tensile elastic force toward the rear.

As shown in fig. 4 to 5, when the pad 110 is unfolded in the event of a vehicle accident, the connector 133 connected to one end of the guide 120 applies a tensile elastic force toward the rear from the first position (see fig. 4). When the pad 110 is unfolded, the connector 133 is moved to a second position (see fig. 5) ahead of the first position by frictional resistance applied to the guide 120, thereby reducing the tension of the guide 120.

As shown in fig. 5, that is, although the tensile elastic force of the deployment resistance reducer 130 is overcome by the frictional resistance applied to the guide 120, the guide 120 may be loosened. That is, the tension of the guide 120 may be reduced.

As shown in fig. 6, when the mat 110 is completely unfolded, the unfolding resistance reducer 130 applies a tensile elastic force toward the rear, and restores the tension of the guide 120 to the original tension.

As shown in fig. 3 to 6, the rear end of the deployment resistance reducer 130 according to the embodiment of the present disclosure may be fixed, and the connector 133 at the front of the deployment resistance reducer 130 may be connected to one end of the guide 120 and apply a tensile elastic force toward the rear.

In this case, when the pad 110 is unfolded, the length of the unfolding resistance reducer 130 may increase toward the front as shown in fig. 5, and when the pad 110 is completely unfolded, the length of the unfolding resistance reducer 130 may be restored to the original length by the tensile elastic force as shown in fig. 6.

For this operation, a helical-shaped extension spring may be used as the deployment resistance reducer 130, and the deployment resistance reducer 130 may be disposed in a guide housing 131 that is open at the front side, as shown in fig. 3 to 6. The rear end of the deployment resistance reducer 130 may be fixed to the guide housing 131.

The guide housing 131 according to the embodiment of the present disclosure may be fixedly installed in a structure of the vehicle 10 and have an installation space formed therein. The installation space may be opened forward such that the deployment resistance reducer 130 is disposed in the guide housing 131.

The guide housing 131 or the inner circumferential surface of the guide housing 131 may be made of a material capable of absorbing vibration and noise, and the installation space of the guide housing 131 may have a shape corresponding to the deployment resistance reducer 130.

When the pad 110 is unfolded due to the occurrence of a vehicle accident, the front end of the unfolding resistance reducer 130 can appear and disappear through the open front portion of the guide housing 131, as shown in fig. 5 and 6.

The guide housing 131 according to the embodiment of the present disclosure may be installed to cover the deployment resistance reducer 130 in the longitudinal deformation direction and the orthogonal direction, and the deployment resistance reducer 130 may be supported in the installation space of the guide housing 131.

As shown in fig. 7, the guide housing 131 may further include an impact absorbing layer 131a formed in the installation space of the guide housing 131, the impact absorbing layer 131a being made of an elastic material (rubber, resin, etc.). The impact absorbing layer 131a may support the outside of the deployment resistance reducer 130.

That is, since the installation space of the guide housing 131 supports the outside of the deployment resistance reducer 130, the movement of the deployment resistance reducer 130 can be prevented. When the shock absorbing layer 131a is formed in the installation space of the guide housing 131, the shock absorbing layer 131a may absorb vibration and noise of the deployment resistance reducer 130.

As shown in fig. 8 to 11, the front end of the deployment resistance reducer 130 according to another embodiment of the present disclosure may be fixed, and the rear end thereof may be connected to one end of the guide 120 and apply a compressive elastic force toward the rear.

In this case, when the pad 110 is unfolded, as shown in fig. 9, the length of the unfolding resistance reducer 130 may be reduced toward the front, and when the pad 110 is completely unfolded, as shown in fig. 10, the length of the unfolding resistance reducer 130 may be restored to the original length by the compressive elastic force.

For this operation, a compression spring of a spiral shape may be used as the expansion resistance reducer 130, and the expansion resistance reducer 130 may be provided in the guide housing 131-1, as shown in fig. 8 to 11.

At this time, the front end of the deployment resistance reducer 130 may be disposed while being supported by the inside of the guide housing 131-1, and the rear end of the deployment resistance reducer 130 may be compressed in the front-rear direction and elastically restored toward the rear.

The guide housing 131-1 or the inner circumferential surface of the guide housing 131-1 may be made of a material capable of absorbing vibration and noise, and the installation space of the guide housing 131-1 may have a shape corresponding to the deployment resistance reducer 130.

The guide housing 131-1 according to another embodiment of the present disclosure may be installed to cover the deployment resistance reducer 130 in the longitudinal deformation direction and the orthogonal direction, and the deployment resistance reducer 130 may be supported in the installation space of the guide housing 131-1.

As shown in fig. 11, the guide housing 131-1 may further include an impact absorbing layer 131-1a formed in the installation space of the guide housing 131-1, the impact absorbing layer 131-1a being made of an elastic material (rubber, resin, etc.). The impact absorbing layer 131-1a may support the outside of the deployment resistance reducer 130.

That is, since the installation space of the guide housing 131-1 supports the outside of the deployment resistance reducer 130, the movement of the deployment resistance reducer 130 can be prevented. When the impact absorption layer 131-1a is formed in the installation space of the guide housing 131-1, the impact absorption layer 131-1a may absorb vibration and noise of the deployment resistance reducer 130.

The deployment resistance reducer 130 according to another embodiment of the present disclosure may include a locking member 132, the locking member 132 being locked to the connector 133-1 at a rear portion thereof so as to move in the front-rear direction.

At this time, one end of the guide 120 may be connected to the locking member 132 through the deployment resistance reducer 130. When the deployment resistance reducer 130 functions as a coil spring, the guide may pass through the coil spring toward the rear.

As shown in fig. 4 to 6, the connector 133 of the deployment resistance reducer 130 according to the embodiment of the present disclosure refers to the front end of the deployment resistance reducer 130, which is connected to one end of the guide 120, and the position of the connector 133 may be changed to various positions other than the front end, if necessary.

On the other hand, as shown in fig. 8 and 11, the connector 133-1 of the deployment resistance reducer 130 according to another embodiment of the present disclosure refers to the rear end of the deployment resistance reducer 130, which is connected to one end of the guide 120, and the position of the connector 133-1 may be changed to various positions other than the rear end, if necessary.

Hereinafter, a deployment process of the roof airbag device according to the embodiment of the present disclosure in the case where a rollover accident and a frontal collision accident of the vehicle occur will be described with reference to fig. 1 to 11.

In the roof airbag device according to the embodiment of the present disclosure, as shown in fig. 4, the guide 120 maintains a linear shape in the longitudinal direction while maintaining a predetermined tension by the tensile elastic force of the deployment resistance reducer 130, and the connector 133 of the deployment resistance reducer 130 is connected to one end of the guide 120 at the first position and applies the tensile elastic force toward the rear.

When a rollover accident occurs, as shown in fig. 5, the inflator 20 is operated according to a sensing signal transmitted from a rollover sensor (not shown), and the cushion 110 is deployed by the gas supplied from the inflator 20.

In this process, the guide ring 113 of the pad 110 slides forward in the longitudinal direction of the guide 120, and a force is applied to the front of the guide 120 by a frictional resistance generated when the guide ring 113 moves.

At this time, the length of the unrolling resistance reducer 130 is increased while the connector 133 of the unrolling resistance reducer 130 protrudes toward the front of the guide housing 131 by the moving distance B, and the guide 120 is relaxed while the tension of the guide 120 in the longitudinal direction is reduced by the increase in the length of the unrolling resistance reducer 130.

That is, when the pad 110 is unfolded at an initial stage, the connector 133 of the unfolding resistance reducer 130 extends a predetermined length from the first position to the second position in the unfolding direction of the pad 110. Therefore, since the guide 120 becomes slack, the frictional resistance can be reduced when the guide ring 113 moves on the guide 120. Therefore, when the pad 110 is unfolded at an initial stage, frictional resistance between the guide ring 113 and the guide 120 may be reduced.

Then, when the pad 110 is completely unfolded, the pad 110 blocks the space of the roof 11, and the length of the unfolding resistance reducer 130 is reduced to the original length by the tensile elastic force, as shown in fig. 6. Further, as the length of the unwinding resistance reducer 130 is reduced, the guide 120 maintains a linear shape in the longitudinal direction while maintaining a predetermined tension.

In the roof airbag apparatus according to another embodiment of the present disclosure, the guide 120 maintains a linear shape in the longitudinal direction while maintaining a predetermined tension by a compressive elastic force of the deployment resistance reducer 130 in a state where the cushion 110 is not deployed, as shown in fig. 8.

When a rollover accident occurs, as shown in fig. 9, the inflator 20 is operated according to a sensing signal transmitted from a rollover sensor (not shown), and the cushion 110 is deployed by the gas supplied from the inflator 20.

At this time, the guide 120 guides the locking member 132 forward, the length of the deployment resistance reducer 130 is reduced, while the rear end of the deployment resistance reducer 130 is compressed forward by the movement of the locking member 132, and the tension of the guide 120 in the longitudinal direction is reduced by the reduction of the length of the deployment resistance reducer 130.

That is, when the pad 110 is unfolded at an initial stage, the unfolding resistance reducer 130 is reduced by a predetermined length in the unfolding direction of the pad 110. Therefore, since the guide 120 becomes slack, the frictional resistance can be reduced when the guide ring 113 moves on the guide 120. Therefore, when the pad 110 is unfolded at an initial stage, frictional resistance between the guide ring 113 and the guide 120 may be reduced.

Then, when the pad 110 is completely unfolded, the pad 110 blocks the space of the roof 11, and the length of the unfolding resistance reducer 130 is restored to the original length by the tensile elastic force, as shown in fig. 10. Further, as the length of the unwinding resistance reducer 130 increases, the guide 120 maintains a linear shape in the longitudinal direction while maintaining a predetermined tension.

The roof airbag apparatus according to the embodiment of the present disclosure may reduce frictional resistance between the guide 120 and the guide ring 113 when the pad 110 is deployed, thereby preventing the guide from being damaged due to the deployment of the pad 110. Further, a guide housing 131 or 131-1 and an impact absorbing layer 131a or 131-1a may be formed outside the deployment resistance reducer 130, thereby not only preventing movement of the deployment resistance reducer 130 but also reducing noise and impact due to the movement.

Although the exemplary embodiments of the present disclosure have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the disclosure as defined in the accompanying claims.

Claims

1. A roof airbag device characterized by comprising:

a pad configured to cover the roof in a deployed state;

a pair of guides having a length in a deployment direction of the pad and configured to guide both sides of the pad in the deployment direction; and

a deployment resistance reducer having a connector connected to one end of each of the guides so as to apply an elastic force toward a rear direction from a first position, wherein the connector is moved to a second position forward of the first position by a frictional resistance applied to the guides in a state where the mat is deployed.

2. The roof airbag apparatus of claim 1, wherein the deployment resistance reducer applies a return spring force toward the rear so that the connector returns from the second position to the first position.

3. The roof airbag apparatus according to claim 2, characterized in that the deployment resistance reducer has a fixed rear end and a front end connected to one end of the guide member, and the deployment resistance reducer applies a tensile elastic force toward the rear.

4. The roof airbag apparatus according to claim 3, characterized in that the length of the deployment resistance reducer increases toward the front in a state where the cushion is deployed, and the length of the deployment resistance reducer is restored to an original length by the tensile elastic force in a state where the cushion is fully deployed.

5. The roof airbag apparatus according to claim 4, characterized in that the deployment resistance reducer is provided in a guide housing that is open at the front.

6. The roof airbag apparatus of claim 5, wherein the guide housing further comprises an impact absorbing layer formed in the guide housing, the impact absorbing layer being made of an elastic material.

7. The roof airbag apparatus according to claim 2, characterized in that the deployment resistance reducer has a fixed front end and a rear end connected to one end of the guide member, and the deployment resistance reducer applies a compressive elastic force toward the rear.

8. The roof airbag apparatus according to claim 7, characterized in that the length of the deployment resistance reducer is reduced toward the front in a state where the cushion is deployed, and the length of the deployment resistance reducer is restored to an original length by the compressive elastic force in a state where the cushion is fully deployed.

9. The roof airbag apparatus according to claim 8, characterized in that the deployment resistance reducer is provided in a guide case and a front end of the deployment resistance reducer is supported.

10. The roof airbag apparatus according to claim 9, characterized in that a locking member is locked to a rear end of the deployment resistance reducer so as to move in a front-rear direction, and

one end of the guide is connected to the locking member through the deployment resistance reducer.

11. The roof airbag apparatus of claim 9, wherein the guide housing further comprises an impact absorbing layer formed in the guide housing, the impact absorbing layer being made of an elastic material.

12. The roof airbag apparatus of claim 1, wherein the cushion further comprises guide rings disposed on either side of the cushion such that they are slidable along the guide.